update date time to yyyy-mm-dd code example

Example 1: python date from yy/mm/dd to yy-mm-dd

lastconnection = datetime.strptime("21/12/2008", "%d/%m/%Y").strftime('%Y-%m-%d')

Example 2: Convert a date to yyyy mm dd format

const formatYmd = date => date.toISOString().slice(0, 10);
formatYmd(new Date());